Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Chalcocite from
Schuyler Copper Mine, North Arlington, Bergen County, New Jersey, USA


05846670017370236831978.jpg
Chalcocite, etc.

Schuyler Copper Mine, North Arlington, Bergen County, New Jersey, USA
05846670017370236831978.jpg
Chalcocite, etc.

Schuyler Copper Mine, North Arlington, Bergen County, New Jersey, USA
03840410017370236849989.jpg
Chalcocite, etc.

Schuyler Copper Mine, North Arlington, Bergen County, New Jersey, USA
Locality type:Mine
Classification
Species:Chalcocite
Formula:Cu2S
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Malachite3
Chrysocolla1
Baryte1
Data
Mineral Data:Click here to view Chalcocite data
Locality Data:Click here to view Schuyler Copper Mine, North Arlington, Bergen County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:73358
Long-form Identifier:1:3:73358:8
GUID (UUID V4):0
Nearest other occurrences of Chalcocite
4.1km (2.6 miles) ⓘLaurel Hill, Secaucus, Hudson County, New Jersey, USA
4.5km (2.8 miles) ⓘAvondale, Nutley, Essex County, New Jersey, USA
6.6km (4.1 miles) ⓘGlen Ridge Mines, Glen Ridge, Essex County, New Jersey, USA
7.5km (4.6 miles) ⓘDod Mine, East Orange, Essex County, New Jersey, USA
10.4km (6.4 miles) ⓘMcDowell's Quarry (Osborne and Marsellis Quarry), Upper Montclair, Montclair, Essex County, New Jersey, USA
11.7km (7.3 miles) ⓘHoudaille Quarry, Little Falls Township, Passaic County, New Jersey, USA
12.1km (7.5 miles) ⓘUnion Building and Construction Quarry, Woodland Park, Passaic County, New Jersey, USA
12.4km (7.7 miles) ⓘFrancisco Brothers Quarry, Great Notch, Little Falls Township, Passaic County, New Jersey, USA
15.0km (9.3 miles) ⓘUpper New Street Quarry, Paterson, Passaic County, New Jersey, USA
18.6km (11.5 miles) ⓘProspect Park Quarry, Prospect Park, Passaic County, New Jersey, USA
References
New Jersey State Geologist's Annual Report (1906) 140-142.
Black, George F. (1922) The Belleville copper-mine. American Mineralogist, 7 (9). 154-158
 
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